BORROWINGS (Short-Term Borrowings) (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2018 |
Dec. 31, 2017 |
|
| Debt Disclosure [Abstract] | ||
| Securities sold under agreements to repurchase | $ 31,593 | $ 49,152 |
| Other short-term borrowings | 1,022,000 | 745,000 |
| Total short-term borrowings | 1,053,593 | 794,152 |
| Maximum month-end outstanding balance | 1,207,206 | 794,152 |
| Average outstanding balance during the period | $ 1,133,603 | $ 602,553 |
| Average interest rate (during the period) | 1.52% | 1.00% |
| Average interest rate at end of period | 1.64% | 1.32% |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The average effective interest rate during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of borrowings classified as other, maturing within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period. No definition available.
|
| X | ||||||||||
- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, maximum month-end borrowings during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|